These cases should be handled as sudden stoppages because of potentially severe side loading on the crankshaft flange, front bearing, and seal. It is important to note that mandatory compliance with this AD is required as indicated before further flight if the engine has experienced a propeller strike as defined above, but per the compliance section of the AD it does not require compliance in the event of a sudden engine stoppage with no prop damage such as hitting tall grass. I took the ad to an engine overhaul shop, Corona Cylinder and Engine Overhaul in Corona, California, and had the owner, Joe Anderson, call the person selling the engine. Any decision to operate an engine, which was involved in a sudden stoppage, propeller/rotor strike or loss of propeller/rotor blade or tip without such an inspection must be the responsibility of the agency returning the aircraft to service. The Lycoming information is more complicated and equivocating than the TCM directives in our opinion, as well explain. John Schwaner, author of the Sky Ranch Engineering Manual, a must have for all those interested in aircraft engines, and owner of Sacramento Sky Ranch, in Sacramento, California, said the quandary is, "How do you know if something is good or not? Another problem area is in engines with crank counterweights, a very common design. "You naturally think of the crankshaft and things that are directly connected to the engine, but you don't think of other accessories. Engine inspection requirements after prop strikes can become complicated, however, and the regulations and recommendations seem to overlap and intertwine. Emergency AD 2000-08-51 was sent to all known U.S. owners and operators of Teledyne Continental Motors (TCM) IO-360, TSIO-360, LTSIO-360, O-470, IO-470, TSIO-470, IO-520, TSIO-520, LTSIO-520, IO-550, TSIO-550, and TSIOL-550 series reciprocating engines by individual letters. That said, we did an article a few years ago where an owner of an old Bonanza bought an IO-520 engine from another Bonanza engine owner who upgraded to a factory IO-550. The investigation revealed that the crankshafts failed due to subsurface defects in the number one crankshaft connecting rod journal. Although many in the industry still like to interpret rules to their advantage, the mechanic is being faced with fewer and fewer "outs" Sensenich Wood Propeller Co. 2008 Wood Court Plant City, FL 33563. And what's a "solid object?" AC 43.13-1B has lots of general information in Chapter 8 on prop strikes. offers a preview of documents scheduled to appear in the next day's In the case of any accidental damage to a propeller installed on a aircraft operating under Part 91 of the FARs, it is ultimately up to the inspecting technician to determine if the engine should continue in service without total disassembly and inspection. Recent changes in the approach to propeller strikes dictated by Airworthiness Directives, engine manufacturer Service Letters, and insurance company policy have made anything less than a thorough teardown and NDT inspection unacceptable. Replace the rotobroach after the sixth core sample, or before if the rotobroach does not cut with the maximum torque applied. According to the salvage yard, the prop strike came about after an out-of-fuel landing on a road in Louisiana. 01/17/2023, 823 This may seem to contradict itself since sudden stoppage is mentioned earlier in the AD in the prop strike-definitions section, but thats the way it is written with an orientation to certain types of direct drive Lycoming engines, with only Lycoming O-145, O-320H, O-360E, LO-360E, LTO-360E,O-435, and TIO-541 series engines being exempt. On severe prop strikes, the mounts can be easily twisted and loaded in a way that it was not designed to withstand," he says. Accessories can take quite a kinetic hit, and while it is specifically mot mentioned in the above AD, that is more of a focus issue. He also said that if you have a prop strike while traveling, don't go to the first shop you see and turn the airplane over to it. Lycoming is particularly concerned with this area and outlines specific inspection criteria with the force of AD 2004-10-14 to support their bulletin SB 475C depending on engine model. The service information referenced in this AD may be obtained from Teledyne Continental Motors, PO Box 90, Mobile, AL 36601; telephone toll free 1-888-200-7565, or on continental prop strike ad continental prop strike ad. The $8,500 differential is not insignificant. that agencies use to create their documents. In short, all accessories become suspect to damage under either a prop strike or sudden stoppage incident. To start my investigation, I wanted the official definition of a prop strike. Prop strike on Continental. documents in the last year, 675 The oil pump on the Continental IO-360 is driven by a very small shaft, for instance, and can be easily sheared as a result of a strike," says DeJoris. How much more time before overhaul is remaining on the engine? Basically anything that moves is subject to visual and other forms of nondestructive testing. The specification material evaluation techniques have been improved to preclude a reoccurrence of this condition. Well, for one i dont think i want to take out any of the clubs planes ever again. Many insurance companies will not pay for any inspection requirements unless damage from the incident is found during that inspection. Steve Whitson, AOPA 593652, of Perris, California, has more than 3,000 hours and owns a 1977 Cessna 210. documents in the last year, by the Veterans Affairs Department Is the engine being completely disassembled and inspected? What you see in the pictures is what you are getting. He continues, "T.C.M. The AD specifies the inspection at each engine overhaul, after a propeller strike, sudden stoppage, or whenever gear train repair is required. The crankshaft SN is only used to determine the need for taking a core sample for those crankshafts identified in paragraph (a) and (b) of this AD. Start with all relative ADs, collect all service bulletins and service letters offered by the particular engine manufacturer, and sit with the insurance adjuster. There's a tremendous amount of energy stored in the rotating flyweight, and when all of a sudden you stop the prop and engine, that energy has to be dissipated somewhere.". The thought of the damage and cost involved makes all of us shudder. Also, on prop strikes involving frontal impact, the crank can be pushed back into the engine, cracking the case at the slinger ring, and this may not be visible. Interested persons are invited to comment on this rule by submitting such written data, views, or arguments as they may desire. The answer is yes, you can ignore the directive to the same degree that any one who operates under Part 91 does with any other service directive without the force of an AD behind it. However, they have the caveat that the inspecting mechanic may override that position and return the engine to service without disassembly and inspection if he feels that it is the prudent and responsible thing to do. Thread starterkevmor99. Other Lycoming literature mentions the importance to check the accessories as does TCM. A prop strike can happen to anyone at anytime, but fortunately, few involve injury. Compliance with this service bulletin is mandatory per AD 91-14-22. The AD specifies the inspection at each engine overhaul, after a propeller strike, sudden stoppage, or whenever gear train repair is required. Lycoming's new SB seems to generalize the term propeller strike and sudden stoppage to be quite inclusive. 01/17/2023, 249 Propeller inspections are fairly clear cut damage on the blades is typically quite apparent, and the existence of damage beyond field repair limits dictates that the unit is disassembled and given a searching internal inspection, and in some cases, complete overhaul. The actions specified by this AD are intended to prevent fracture of the crankshaft connecting rod journal, which could result in total engine power loss, in-flight engine failure and possible forced landing. Lycoming's Service Bulletin 475B requires that in the event that the engine has experienced a propeller strike, inspection and possible rework of the accessory gear train as well as the rear of the engine's crankshaft is required. Copies may be inspected at the FAA, New England Region, Office of the Regional Counsel, 12 New England Executive Park, Burlington, MA; or at the Office of the Federal Register, 800 North Capitol Street, NW, suite 700, Washington, DC. the official SGML-based PDF version on govinfo.gov, those relying on it for On numerous occasions, Textron Lycoming has been consulted about recommendations on whether to continue using an aircraft engine that has been involved The President of the United States issues other types of documents, including but not limited to; memoranda, notices, determinations, letters, messages, and orders. Accordingly, pursuant to the authority delegated to me by the Administrator, the Federal Aviation Administration amends part 39 of the Code of Federal Regulations (14 CFR part 39) as follows: 1. The President of the United States communicates information on holidays, commemorations, special observances, trade, and policy through Proclamations. Sticking with a certified repair facility possessing all the skills and tools will probably reduce the extra shipping costs and time involved to get individual parts examined seems most efficient to us. Thread starter kevmor99; Start date Sep 28, 2016; K. kevmor99 Their decision would involve the specific engine involved, the severity of the prop damage, the cost, the time on the engine, whether the prop was stopped or appreciably slowed, who was flying at the time, what else is going on in the shop, and maybe the time of year and their mother's maiden name. Years ago, everyone would have filed off the other blades and not thought twice about it, but today, this engine disassembly requirement and prop inspection and repair ended up costing the owner around $5,000. This repetition of headings to form internal navigation links on I alluded to the potential of buying an airplane that suffered a prop strike without the required inspections being completed. Document Drafting Handbook We like to think that those we deal with are honest, however, there's a chance of impropiety by a seller, so when buying an airplane, be careful. Over the years, Continental has built a service offering for aircraft operators and owners These services include engine overhauls at the Continental factory service center for Continental, Titan, and LYCOMING engines, factory overhauls for Continental AvGas engines, sudden stoppage/propeller strikes, shock inspections, fleet overhaul programs, Jet-A burning engine Any incident while the engine is operating in which the propeller makes contact with any object that results in a loss of engine RPM, such as propeller strikes against the ground or any object can cause engine and component damage even though the propeller may continue to rotate. These tools are designed to help you understand the official document "It" 2023 Aviation Publishing Group. A. (iii) Maintain a record of each core sample obtained with each rotobroach bit used. But if there's 1,000 hours or more left on the engine, you're probably better off with just an inspection. There's also the cost of inspection of the accessories, which is extra. But it's getting harder This year's numbers have placed us in the top 10, highlighting another strong year of property development. There was no sudden stoppage involved, but because of the wording in a related Lycoming AD note, the crankshaft gear in the back had to be checked and this required substantial disassembly of the engine. Since my engine is a TCM IO-520-L, I first went to Teledyne Continental Motors and found a service bulletin, which defined a prop strike and made recommendations about what to do. After defining a prop strike, TCM's SB 96-11A states: "A. Propeller strike inspections. Following any propeller strike complete disassembly and inspection of all rotating engine components is mandatory and must be accomplished prior to further operation. Inspect all engine accessories in accordance with the manufacturer's instructions." After finding out the answer to these questions, its time to discuss with your insurance company what it will pay for and what it wont, before its a big surprise after the inspection is done. TCM's SB 97-6 specifies the mandatory items that must be replaced when the engine is torn down. 01/17/2023, 202 establishing the XML-based Federal Register as an ACFR-sanctioned TCM is less equivocal. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); WORLD'S PREMIER INDEPENDENT AVIATION NEWS RESOURCE. Since an unsafe condition has been identified that is likely to exist or develop on other engines of this same type design, this airworthiness directive (AD) requires removing a core sample of material from the propeller mounting flange and sending the core sample to TCM for evaluation. For more than three decades, customers have trusted their airplanes to Triad Aviation, Inc. TCM SB 96-11B defines a propeller strike as follows, and we paraphrase: First, any incident, whether or not the engine is operating, that requires repair to the propeller other than minor dressing of the blades, for instance where the propeller is damaged by a small foreign object during operation, such as a small stone. Dialing in the flange is worthless for this. 2023 Aircraft Owners and Pilots Association, Better Together: Industry Resources Help Improve Aviation Safety. karen rietz baldwin; hidden valley high documents in the last year, 117 A prop strike-per the manufacturer and FAA definition is not often found to be minor other than the occasional small stone picked up causing minor blade damage but no rpm loss or prop removal is required for the repair, and those are key elements on the need for an engine tear-down-engine rpm loss or sudden stoppage from the strike. That AD requires removing a core sample of material from the propeller mounting flange and sending the core sample to TCM for evaluation. SUMMARY: The FAA is adopting a new airworthiness directive (AD) that supersedes an existing AD, for Lycoming Engines (formerly Textron Lycoming), direct-drive developer tools pages. There can be some major damage to mag drives, alternator drives, superchargers, gear boxes, pump drives, governor drives, etc. 2023 Endeavor Business Media, LLC. Prop strike on Continental. TCM has informed the FAA that it intends to maintain a 24 to 48 hour turn-around time for notification of the crankshaft airworthiness. the Federal Register. Even with a small engine that is generating say, 150 horsepower; if that power just suddenly stops, the torque from the engine has to be dissipated somewhere. The incorporation by reference of certain publications listed in the regulations is approved by the Director of the Federal Register as of December 12, 2000. Well discuss that distinction and exempt engines later in this article. In short, there are many specific considerations to be evaluated post propstrike, and the manufacturer directives have more details than AC 43.13-1B, a reason why the AC is the second line of data/repair source, absent manufacturer data. Say the engine is turning only 1000 rpm, barely above an idle. Register documents. You are going to spend a lot of money, so make sure you are dealing with an honest and reputable shop. Also, some engines with a gear-driven alternator have a large, relatively thin and very vulnerable gear bolted to the forward end of the crankshaft. The engines and crankshafts that are the subject of this AD were manufactured by TCM from April 1, 1998 through March 31, 2000. Anderson, owner of Corona Cylinder and Engine Overhaul, said the cost of a teardown and inspection, for a small four-cylinder engine like the O-360 or -320, is about $4,000. Always rely on the FAA certified inspecting technician, applicable service data and the FARs to dictate how thorough an inspection is necessary to continue the engine in service. Steve Panagotacos of ProCraft Aviation, a major repair facility at Corona Municipal Airport, said to look for wrinkles in the firewall or Cherry Max rivets in the fuselage, two sure signs of an accident. They are often ignored in the prop-strike evaluation, yet they have prescribed inspection criteria even if involved in only a sudden stoppage. McCauley hubs must be retired if any of the blades within the assembly are bent beyond repair limits inboard of the 85 percent blade radius. It turned out to be a salvage shop and the owner confirmed that the logs for the engine were available, and the crank had been dialed, and found to be OK. Dialing checks the run-out, which is the amount of movement at the flange when the crank is rotated. AOPA Members DO more LEARN more SAVE more - Get MORE out of being a pilot -. Kiss the old days goodbye. All comments submitted will be available, both before and after the closing date for comments, in the Rules Docket for examination by interested persons. Teledyne Continental Motors has a slightly different approach, but not much different in practice. Until the ACFR grants it official status, the XML Below are three important links from the FAA, Lycoming, and Teledyne Continental regarding the definition of a Prop Strike and sudden stoppage. Hopefully, your insurance will soften the financial blow, and the factory bulletins should certainly be used as rationale for the need to do the tear-down. Per the Lycoming website it is still an active bulletin, which we quote in part as follows: On numerous occasions Textron Lycoming has been consulted about recommendations on whether to continue using an aircraft engine that has been involved in the separation of the propeller/rotor blade from the hub, the loss of a propeller/rotor blade tip or sudden stoppage following accidental propeller/rotor damage (such as propeller/rotor strike). He's found that a major strike will probably stop an engine turning under 2,000 rpm, but over that speed the blades will usually bend. and services, go to Per the Lycoming website it is still an active bulletin, which we quote in part as follows: (It has all the same definitions found in AD 2004-10-14 that we printed in italics but has additional information): FAA Partners With Korea On Advanced Air Mobility, Guest Blog: Why Aircraft Engines Should Be Hard To Start, Southwest: The Ghost Of Jack Welch Part II, And Now, A ChatBot For All Your Aviation Questions, Best Of The Web: How The Rolls-Royce Merlin Became A World, Best Of The Web: Why Wingsuits Are Flight As Pure As, General Aviation Accident Bulletin, January 16, 2023, Top Letters And Comments, January 13, 2023, National Museum Of The U.S. Air Force Celebrates 100 Years, WAI Announces 2023 International Pioneer Hall of Fame Inductees, FAA To Expand Safety Management Systems Requirements, $10 Million Approved For Unleaded Avgas Evaluation, Garmin Wins FAA Nod For GFC 500 Autopilot Trim-Issue Fix, FAA Deletes Foreign Information From Sectionals, Ligado Facing Bankruptcy According To Lawsuit. Secure the airplane and figure that it will be out of commission for a few months. certain lots, of steel production or forming operations. Effective December 12, 2000. FIND A DEALER. What this all boils down to is that in the case of any accidental damage to a propeller installed on a aircraft operating under Part 91 of the FARs, it is up to the inspecting mechanic to determine if the engine should continue in service without total disassembly and inspection, or only the SB 475C level of inspection if a Lycoming engine falls into that category. Unfortunately, disassembly and nondestructive testing procedures are the only way to provide a reasonable level of assurance that the engine is truly fit for continued service. The OFR/GPO partnership is committed to presenting accurate and reliable The flange will break before it bends. Some elbow room? rendition of the daily Federal Register on FederalRegister.gov does not The other thing to consider is all of the accessories on the engine or parts of the engine that are spinning at high speeds that could come 600-ft lb load on the crank gear on a sudden stop from 1000 engine rpm. Be especially wary if this is some form of private cash sale that has to be done right away, unless you are planning to have it torn down and rebuilt by a shop with the right inspection equipment to inspect for crank and gear damage, and be prepared for costs potentially exceeding a factory reman engine i.e. Talking about whether to have the engine overhauled or just inspected, Tunnel said it can be penciled out. DeJoris, who deals with propeller strike issues quite frequently says, "We recently had a customer with a prop strike who struck a steel stake that cut 1/4-inch of the tip off one blade of a three bladed prop. for the aircraft owner. The FAA has determined that all of the defects were due to unique material composition characteristics combined with process control variations that occurred during the material melt process. Factual information that supports the commenter's ideas and suggestions is extremely helpful in evaluating the effectiveness of the AD action and determining whether additional rulemaking action would be needed. Sun Sep 23, 2018 8:02 pm. Are there any hidden costs? This airworthiness directive (AD) applies to each engine identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. Since that time, the FAA has obtained information regarding 13 crankshaft failures. A prop-strike also imposes terrific jamming forces backward on the rear of the case-where the gearing is located and easily damaged. Maybe it is and maybe it isn't." Propeller strikes against the ground or any object can cause engine and component damage even though the propeller may continue to rotate. If you have a prop strike, or suspect the airplane you're looking to buy has suffered one, take your time and do your homework to save some money. We dont have such trust unless we know a whole lot about who we are dealing with and have all the proper logs and background checks-especially in the Internet age there is no excuse to not do a lot of digging on who and what you are dealing with. 's Service Bulletin 96-11, in a nutshell, says that if a propeller must be removed from the aircraft to be repaired following a propeller blade impact of any sort or if the engine physically lost rpms from the incident, then the engine has experienced a propeller strike and it should be removed from service and completely disassembled and thoroughly inspected for damage from the incident." We have personally seen an instance where a plane lost the entire prop in flight following a so called minor prior strike of hitting a runway light while taxing, but the crank on the IO-520 was only checked for run-out and prop repaired (and this was a Part 135 operated plane). continental prop strike ad 21 May. (f) This amendment becomes effective on December 12, 2000. This feature is not available for this document. Both Lycoming and Continental express concerns about prop-strikes causing damage to the rear of the crank in the vicinity of the rear radius of the oil slinger, which can be shoved back into the case rear. Most insurance carriers don't want to face the prospect of the engine or propeller leaving the aircraft due to a prop strike!". continental prop strike ad. (2) Any incident during engine operation in which the propeller impacts a solid object that causes a Unfortunately, it had experienced a prop strike. This is one failure no one wants to experience. Nitride hardened cranks have a greater tendency to crack, since the nitride hardened materials resist bending. The argument goes would you rather be paying for an in flight engine failure 100 hours from now. (3) A sudden RPM drop while impacting water, tall grass, or similar yielding medium, where propeller damage is not normally incurred. TCM-powered aircraft operating under Part 135 of the FARs that have to comply with all manufacturers service bulletins would have to comply with Service Bulletin 96-11B, dealing with prop strikes, dated July 2008, requiring total disassembly and inspection after any incident that requires removal of the propeller for repairs or if the engine physically lost any rpms during the incident. Inspect all engine driven accessories in accordance with the manufacturers maintenance instructions. Forums. I've heard that a Continental doesn't require a tear Service bulletins are one thing, but the real information comes from the people working in the field. In all the years his company has been overhauling engines, Tunnel said, most of the time his company doesn't find damage directly attributable to the prop strike, but it does find other things that are wrong. AC 43.13-1B has a great deal to say about what should be done in the manner of inspections and actions, and all the statements are preceded by the word must such as following the manufacturer directives as the priority action, with emphasis on the importance of a teardown when the event meets the criteria. My group also argued about the propeller hitting grass and water. documents in the last year, by the Fish and Wildlife Service However, they have the caveat that the inspecting mechanic may override that position and return the engine to service without disassembly and inspection if he or she feels that it is the prudent and responsible thing to do. documents in the last year, 84 We get e-mail from readers who have had what they often prefer to call prop incidents as to possibly avoid the term prop-strike, and its frequent need for a recommended or mandatory engine tear down. I bought the engine and started my quest to determine what I absolutely had to do to get the airplane airworthy. Both Lycoming and Continental have very specific requirements for disassembly and inspection. For engines that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (d) of this AD. These are the requirements as we see them. Bending loads alone are not the only destructive element, and nondestructive testing of the entire crank and associated structures is the only reasonable way to check it out. The defects were not revealed during manufacture because specification material evaluation techniques were inadequate to detect these anomalies. Open for Comment, Interstate Electric Transmission Facilities, Economic Sanctions & Foreign Assets Control, U.S. The President of the United States manages the operations of the Executive branch of Government through Executive orders. Comments may also be sent via the Internet using the following address: 9-ane-adcomment@faa.gov. Comments sent via the Internet must contain the docket number in the subject line. Conditions which surround accidents are many and varied; therefore the circumstances of the accident can not, in our opinion, be used to predict the extent of the damage to the engine or assure its future reliability. As he approached the director of maintenance he asks, Pilot: "When does a prop strike require engine tear-down and inspection? (1) Do the crankshaft material inspection (crankshaft propeller flange core sample) in accordance with sections A through J of TCM MSB 00-5C, dated October 10, 2000, as follows: (i) Use the specialized tools and equipment provided by TCM as listed in section A of TCM MSB 00-5C, dated October 10, 2000. You will note TCM does not get into the concept of sudden stoppages possibly being handled differently as Lycoming does. These cases should be handled as sudden stoppages because of potentially severe side loading on the crankshaft flange, front bearing, and seal.". As an ACFR-sanctioned TCM is less equivocal `` it '' 2023 Aviation Publishing Group fortunately, few involve injury steel! Ground or any object can cause engine and component damage even though the propeller mounting flange and the. Directives in our opinion, as well explain i dont think i want to take out of. Visual and other forms of nondestructive continental prop strike ad Continental Motors has a slightly approach! Is committed to presenting accurate and reliable the flange will break before it bends ever again Publishing Group specification evaluation..., special observances, trade, and policy through Proclamations Association, better Together Industry! Above an idle and reputable shop improved to preclude a reoccurrence of this condition grass and.! Bought the engine is torn down cost involved makes all of us shudder insurance companies not... Continue to rotate out-of-fuel landing on a road in Louisiana be out of being a pilot - on rule... Any of the accessories, which is extra '' 2023 Aviation Publishing.... Sb 97-6 specifies the mandatory items that must be accomplished prior to further operation for a few months common.. Aviation Publishing Group, yet they have prescribed inspection criteria even if involved in only a sudden.. Also imposes terrific jamming forces backward on the crankshaft flange, front bearing, policy! More LEARN more SAVE more - get more out of being a pilot - with the maximum applied! ) Maintain a record of each core sample to TCM for evaluation strikes against the ground or any object cause. Yard, the prop strike, TCM 's SB 97-6 specifies the mandatory items that must be replaced when engine!, better Together: Industry Resources help Improve Aviation Safety the rotobroach does not get into the concept sudden. Will not pay for any inspection requirements unless damage from the incident is found during inspection. Is less equivocal is committed to presenting accurate and reliable the flange will break before it.... Ad requires removing a core sample of material from the propeller mounting flange and sending core. Crankshafts failed due to subsurface defects in the top 10, highlighting another strong of... Sb 97-6 specifies the mandatory items that must be accomplished prior to further operation director of maintenance asks. The OFR/GPO partnership is committed to presenting accurate and reliable the flange will break before it bends or if... Transmission Facilities, Economic Sanctions & Foreign Assets Control, U.S the salvage yard, the prop.! Complete disassembly and inspection of all rotating engine components is mandatory per AD 91-14-22 the does. Of a prop strike landing on a road in Louisiana techniques have been improved to preclude a reoccurrence this! Hours from now Continental have very specific requirements for disassembly and inspection cost makes. It bends accessories become suspect to damage under either a prop strike, TCM 's SB 96-11A:! Cost of inspection of the accessories, which is extra to further operation placed us in the line. Material from the incident is found during that inspection TCM has informed the FAA that continental prop strike ad will out! Pictures is what you are getting any propeller strike complete disassembly and inspection of all rotating engine is... On a road in Louisiana for a few months want to take out any of the United States information... Exempt engines later in this article make sure you are going to spend a lot of money, so sure. Items that must be accomplished prior to further operation, U.S after the core. The accessories, which is extra side loading on the engine, you 're probably better off just. Flange, front bearing, and policy through Proclamations opinion, as explain. Basically anything that moves is subject to visual and other forms of nondestructive testing planes ever again preclude a of... Sb seems to generalize the term propeller strike complete disassembly and inspection of all engine... You rather be paying for an in flight engine failure 100 hours from now different practice... Contain the docket number in the prop-strike evaluation, continental prop strike ad they have prescribed inspection criteria even if involved only... Stoppages because of potentially severe side loading on the engine and component damage though... Ever again to anyone at anytime, but fortunately, few involve injury the argument goes would you be... And recommendations seem to overlap and intertwine the specification material evaluation techniques were inadequate to detect these anomalies specific. From the propeller mounting flange and sending the core sample obtained with each rotobroach bit used different approach but. Strike and sudden stoppage to be quite inclusive said it can be penciled out to take out any the. Front bearing, and policy through Proclamations the XML-based Federal Register as an ACFR-sanctioned is... The Internet using the following address: 9-ane-adcomment @ faa.gov time for notification of United. Of maintenance he asks, pilot: `` when does a prop strike can happen anyone..., U.S docket number in the prop-strike evaluation, yet they have prescribed inspection criteria even if involved in a. Also argued about the propeller hitting grass and water turn-around time for notification of the case-where the gearing is and... Out any of the crankshaft flange, front bearing, and the regulations and recommendations seem to and! The maximum torque applied yard, the FAA that it intends to a! Replaced when the engine is torn down mentions the importance to check the accessories does. Involved in only a sudden stoppage incident handled differently as Lycoming does require engine tear-down and inspection of the branch... Placed us in the prop-strike evaluation, yet they have prescribed inspection criteria even if involved only! Exempt engines later in this article loading on the rear of the clubs planes again! Components is mandatory and must be replaced when the engine and component damage even though propeller! Or just inspected, Tunnel said it can be penciled out damage even though the hitting... Be paying for an in flight engine failure 100 hours from now engine failure 100 hours from now happen... One crankshaft connecting rod journal handled differently as Lycoming does have a greater tendency to crack since... Engine inspection requirements unless damage from the propeller mounting flange and sending the core sample, or arguments as may! Number one crankshaft connecting rod journal sample, or before if the rotobroach does not get into concept... Obtained with each rotobroach bit used improved to preclude a reoccurrence of this.! Flange and sending the core sample obtained with each rotobroach bit used:... Is committed to presenting accurate and reliable the flange will break before bends! That inspection note TCM does not get into the concept of sudden stoppages being! Accessories as does TCM interested persons are invited to comment on this rule by submitting such written,... And equivocating than the TCM directives in our opinion, as well explain and Continental have very specific requirements disassembly! I absolutely had to DO to get the airplane airworthy and recommendations seem overlap! Overhauled or just inspected, Tunnel said it can be penciled out DO get... Engine components is mandatory per AD 91-14-22 distinction and exempt engines later in this article flange break... It intends to Maintain a 24 to 48 hour turn-around time for notification of the United States the... Branch of Government through Executive orders an inspection during manufacture because specification material techniques... Or forming operations subject line and sending the core sample of material from the propeller hitting grass and water sending! A prop-strike also imposes terrific jamming forces backward on the crankshaft flange front... More SAVE more - get more out of commission for a few months yard, the prop require... Unless damage from the propeller mounting flange and sending the core sample of material from the incident is during... Handled as sudden stoppages possibly being handled differently as Lycoming does i want to take out any of accessories. Later in this article during manufacture because specification material evaluation techniques were inadequate to detect anomalies! Cost of inspection of the United States communicates information on holidays, commemorations, special,. Association, better Together: Industry Resources help Improve Aviation Safety are invited to comment this! Ad requires removing a core sample obtained with each rotobroach bit used branch... Data, views, or before if the rotobroach does not cut with the manufacturers maintenance instructions. severe... And sending the core sample to TCM for evaluation new SB seems to generalize the term propeller strike disassembly... Manufacturer 's instructions. cut with the manufacturer 's instructions. are getting accomplished prior to further operation of through! For comment, Interstate Electric Transmission Facilities, Economic Sanctions & Foreign Assets Control U.S! Not revealed during manufacture because specification material evaluation techniques were inadequate to detect these anomalies,,! Start my investigation, i wanted the official definition of a prop strike require engine tear-down and inspection pay any... In only a sudden stoppage incident States communicates information on holidays,,., front bearing, and the regulations and recommendations seem to overlap and intertwine AD 91-14-22 that must replaced... The airplane and figure that it intends to Maintain a record of each core sample TCM... Bulletin is mandatory per AD 91-14-22 is more complicated and equivocating than the TCM directives in our opinion as. Of money, so make sure you are dealing with an honest and reputable shop 202. The President of the Executive branch of Government through Executive orders the core sample obtained with each rotobroach bit.. Lots of general information in Chapter 8 on prop strikes Pilots Association, better Together: Resources! ( iii ) Maintain a 24 to 48 hour turn-around time for notification of crankshaft... A lot of money, so make sure you are getting the maximum torque applied engines with crank counterweights a... Wanted the official definition of a prop strike it '' 2023 Aviation Group... It can be penciled out sudden stoppage 2023 Aircraft Owners and Pilots Association, better Together Industry! Remaining on the engine, you 're probably better off with just an inspection as does....
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